Product Overview

P499 Series Electronic Pressure Transducers Product/Technical Bulletin2
Application
P499 Electronic Pressure Transducers provide several
output options:
• 0.5 to 4.5 VDC ratiometric
• 0 to 10 VDC
• 4 to 20 mA
Pressure connections are available in two standard
styles:
• 1/4 in. SAE 45
o
flare (7/16-20 UNF) internal thread
fitting with Schrader® valve depressor (Style 47)
• 1/8-27 NPT external thread fitting (Style 49)
Contact your local Johnson Controls/PENN
®
representative for more information on options
available for high-volume orders with specific
application requirements, including 316L stainless steel
construction and pressure ranges up to
1764 psi (120 bar).
Typical applications include
• HVAC and refrigeration applications
• chillers
• fan speed controls
• pumps and compressors
• agricultural applications
• industrial process control
Operation
Pressure applied to the P499 transducer acts on a
piezoresistive strain gauge, which is bonded with high-
temperature glass onto a stainless steel diaphragm.
The strain gauge translates media pressure into an
electrical signal. An Application-Specific Integrated
Circuit (ASIC) conditions and amplifies the signal. The
output signal varies in direct linear proportion to the
sensed pressure.
Note: The environmentally-protected (IP67)
P499 transducer measures pressure as psig.
Dimensions
IMPORTANT: P499 Series Electronic Pressure
Transducers are intended to provide a signal to
operating controls under normal operating
conditions. Where failure or malfunction of a P499
Electronic Pressure Transducer could lead to an
abnormal operating condition that could cause
personal injury or damage to the equipment or other
property, other devices (limit or safety controls) or
systems (alarm or supervisory systems) intended to
warn of, or protect against, failure or malfunction of a
P499 Electronic Pressure Transducer must be
incorporated into and maintained as part of the
control system.
Figure 2: Wire Harness and P499 Electronic
Pressure Transducers with
Packard connectors, in. (mm)
5/16
(8)
Maximum
1/8 in. -27 NPT External Thread (Style 49)
1/4 in. SAE 45 Flare Internal Thread
(7/16-20 UNF) with Depressor (Style 47)
o
Insert
Plug
Red Wire = SUPPLY
White Wire = OUTPUT
Black Wire = COMMON
See Table 2.
F
I
G
:
P
4
9
9
d
i
m
e
n
2-11/16
(69)
1/2
(12)
7/8
(22)
Hex
Note: Packard connectors shown